CN219994524U - Self-priming double-needle electromagnetic valve for flameout protection device of kitchen range - Google Patents
Self-priming double-needle electromagnetic valve for flameout protection device of kitchen range Download PDFInfo
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- CN219994524U CN219994524U CN202321670336.XU CN202321670336U CN219994524U CN 219994524 U CN219994524 U CN 219994524U CN 202321670336 U CN202321670336 U CN 202321670336U CN 219994524 U CN219994524 U CN 219994524U
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- 238000007789 sealing Methods 0.000 claims abstract description 60
- 238000010411 cooking Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000006872 improvement Effects 0.000 description 9
- 239000000696 magnetic material Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000776 Common brass Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- Magnetically Actuated Valves (AREA)
Abstract
The utility model discloses a self-priming double-needle electromagnetic valve used on a flameout protection device of a kitchen range, which comprises a shell, an electromagnetic shaft, an electromagnet, a base and a sealing gasket; a framework with a hollow structure is arranged in the shell, and a coil is wound on the framework; the lower part of the electromagnetic shaft extends into the framework; the upper end of the electromagnetic shaft is connected with the sealing gasket, and a spring is arranged between the sealing gasket and the upper end of the shell; the columnar protruding part of the electromagnet extends into the framework, the edge part of the lower connecting part of the electromagnet is riveted with the lower end of the shell, and the middle part of the lower connecting part is riveted in the middle hole of the base; the lower part of the base is provided with a mounting cavity; a double-needle assembly is arranged in the mounting cavity; the double-needle assembly comprises an inner sealing piece, two connecting needles and a plastic piece; the lower part of the connecting needle extends out of the base; the ground wire pin and the main wire pin of the coil respectively penetrate into the corresponding connecting needle and are welded with the end part of the connecting needle. The electromagnetic valve has lower production cost, can realize automatic suction, and has excellent stability and reliability.
Description
Technical Field
The utility model relates to the technical field of electromagnetic valves, in particular to a self-priming double-needle electromagnetic valve used on a flameout protection device of a kitchen range.
Background
The electromagnetic valve in the flameout protection device of the gas cooker can play a role in timely cutting off the air source after the unexpected flameout of the cooker. The existing electromagnetic valve is mainly assembled by an electromagnet, an electromagnetic sheet, a coil, a spring, a sealing gasket, a base and the like. The attraction action of the existing electromagnetic valve mainly adopts a double-pass electric coil to generate a magnetic field so that the electromagnet and the electromagnetic sheet are attracted; because of the limitations of the structure, the coil and the like, the attraction process of the existing electromagnetic valve needs to overcome the spring force attraction, the distance (air gap) between the electromagnet and the electromagnetic sheet is small enough, and the attraction is realized by macroscopic contact of the electromagnet and the electromagnetic sheet, so that the electromagnetic sheet needs to be pushed to contact with the electromagnet by external force when the electromagnetic valve is started. When the device is particularly applied to a gas cooker, a user needs to press a valve rod (knob) by hand to finish the functions of ignition and the like. Because external force is needed to assist in opening the valve, the problem of loosening the hands and flameout often occurs on the kitchen range.
In addition, the attraction reliability of the existing electromagnetic valve is highly dependent on the surface conditions of the electromagnet and the electromagnetic sheet, and once a small amount of fragments, dirt and scratches appear on the attraction surface, the electromagnetic valve is easy to cause functional failure, and the production and inspection cost is increased.
Furthermore, the existing electromagnetic valve has the problems of higher production cost, poor stability and reliability, easy occurrence of functional failure and the like.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range. The electromagnetic valve has lower production cost, can realize automatic suction without manual auxiliary suction, can realize intelligent control, and has excellent stable reliability and suitability.
In order to achieve the technical purpose and the technical effect, the utility model is realized by the following technical scheme:
a self-priming double-needle electromagnetic valve used on a flameout protection device of a kitchen range comprises a shell, an electromagnetic shaft, an electromagnet, a base and a sealing gasket; a framework with a hollow structure is arranged in the shell, and a coil is wound on the framework; the lower part of the electromagnetic shaft extends into the framework; the upper end of the electromagnetic shaft is connected with the sealing gasket, and a spring sleeved on the electromagnetic shaft is arranged between the sealing gasket and the upper end of the shell; the electromagnetic shaft can move up and down; the electromagnet is provided with a columnar protruding part and a lower connecting part, the columnar protruding part of the electromagnet stretches into the framework, the edge part of the lower connecting part of the electromagnet is riveted with the lower end of the shell, and the middle part of the lower connecting part is riveted in the middle hole of the base; two guide holes are formed in the base and the electromagnet; the ground wire pin and the main wire pin of the coil are respectively led out from the corresponding leading holes;
the lower part of the base is provided with a mounting cavity; a double-needle assembly is arranged in the mounting cavity; the double-needle assembly comprises an inner sealing piece, two connecting needles and a plastic piece for wrapping the two connecting needles; the inner sealing piece is hermetically arranged in the mounting cavity of the base, and is provided with two sealing holes matched with the upper ends of the connecting pins; the plastic part is arranged below the inner sealing part; the lower part of the connecting needle extends out of the base; the ground wire pin and the main wire pin of the coil respectively penetrate into the corresponding connecting needle and are welded with the end part of the connecting needle.
As a further improvement of the technical scheme of the utility model, the base is arranged on a bracket which is used for being connected with a gas valve body of the kitchen range; the base is in sealing fit with a gas valve body of the kitchen range.
As a further improvement of the technical scheme of the utility model, the spring is of a conical structure.
As a further improvement of the technical scheme, a gasket sleeved on the electromagnetic shaft is further arranged between the sealing gasket and the spring, the gasket is provided with a concave part and an upper flange, and the upper flange supports the sealing gasket; the concave part is matched with the spring.
As a further improvement of the technical scheme, the middle part of the upper side of the sealing gasket is of a concave structure, and the sealing surface of the sealing gasket is of a convex structure surrounding the concave structure.
As a further improvement of the above technical solution of the present utility model, the lower end of the electromagnetic shaft has a small diameter step.
As a further improvement of the technical scheme of the utility model, the end face of the small-diameter step of the electromagnetic shaft is provided with a pit.
As a further improvement of the technical scheme, the framework is of an I-shaped structure.
As a further improvement of the above technical solution of the present utility model, the upper portion of the housing is a flared necking structure to cooperate with the spring.
As a further improvement of the technical scheme, the outer side of the base is provided with a sealing ring matched with a gas valve body of the kitchen range.
The beneficial effects of the utility model are as follows:
the coil in the electromagnetic valve is wound on the framework, and the lower part of the electromagnetic shaft and the upper part of the electromagnet extend into the framework, so that a magnetic field is generated after the coil is electrified, and the lower end face of the electromagnetic shaft and the upper end face of the electromagnet can be attracted in the framework. The structure of the utility model can lead the sucking process to be carried out in the coil, and the magnetic field intensity generated in the coil is larger, thereby forming stronger magnetic force, overcoming the spring force, realizing the automatic sucking of the electromagnetic valve, and not needing manual auxiliary sucking, thereby not having the problem of the occasional flameout of the kitchen range caused by loosening hands; after the electromagnetic valve is applied to a kitchen range, the electromagnetic valve is matched with a kitchen range circuit design, and intelligent operations such as touch screen control, remote control and timing control can be realized.
The suction of the electromagnetic valve does not need to highly depend on the suction surface condition, thereby improving the functional reliability of the electromagnetic valve and reducing the production and inspection cost.
The skeleton in the electromagnetic valve is wound with the single coil, and the current change of the single coil can be controlled by an external control circuit so as to adopt large current when the electromagnetic valve is started in a sucking way, and small current is adopted in the process of maintaining the sucking way, so that compared with the electromagnetic valve adopting double coils, the electromagnetic valve has the advantage that the cost is reduced.
According to the electromagnetic valve, the ground wire pin and the main wire pin of the coil are welded with the connecting needle through plasma, so that the problem that welding is unreliable caused by welding of the ground wire pin and the side edge of the base through resistance in the prior art can be avoided, the problems of empty welding, virtual welding, wire breakage and the like possibly caused by side edge resistance welding can be effectively avoided, the stability and the reliability of the electromagnetic valve are improved, and the flameout protection function is guaranteed not to be invalid.
The base and the electromagnet in the electromagnetic valve are of a split structure, so that the electromagnet is only required to be processed by using the stainless steel soft magnetic material, the magnetic conduction function is realized, and the base is processed by using common brass, so that the consumption of the stainless steel soft magnetic material is greatly reduced, and the production cost can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to an embodiment of the utility model.
Fig. 2 is a schematic structural view of an electromagnet and a base in the self-priming double needle electromagnetic valve of the utility model.
In the figure, 1: a housing; 2: electromagnetic shaft, 201: small diameter step, 202: pit; 3: electromagnet, 301: columnar boss, 302: lower connection, 303: riveting grooves; 4: a base, 401: a clamping groove; 5: a sealing gasket; 6: a skeleton; 7: coil, 701: ground pin, 702: a main line pin; 8: a spring; 9: an inner seal; 10: a connecting needle; 11: a plastic part; 12: an insulating sleeve; 13: a seal ring; 14: gasket 1401: recess, 1402: upper flange, 15: and (3) a bracket.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
A preferred embodiment of a self-priming double needle solenoid valve for a cooktop flameout protection device is shown in figures 1 and 2; the electromagnetic valve comprises a shell 1, an electromagnetic shaft 2, an electromagnet 3, a base 4 and a sealing gasket 5; a framework 6 with a hollow structure is arranged in the shell 1, and the framework 6 is of an I-shaped structure; a coil 7 is wound on the periphery of the framework 6; the lower part of the electromagnetic shaft 2 extends into the framework 6; the upper end of the electromagnetic shaft 2 is connected with a sealing gasket 5, and a spring 8 sleeved on the electromagnetic shaft 2 is arranged between the sealing gasket 5 and the upper end of the shell 1; the electromagnetic shaft 2 can move up and down;
the electromagnet 3 is provided with a columnar protruding part 301 and a lower connecting part 302, the columnar protruding part 301 of the electromagnet 3 stretches into the framework 6, the edge part of the lower connecting part 302 of the electromagnet 3 is riveted with the lower end of the shell, and the middle part of the lower connecting part 302 is riveted in the middle hole of the base 4; two guide holes are formed in the base 4 and the electromagnet 3; the ground wire pin 701 and the main wire pin 702 of the coil 7 respectively pass through corresponding lead holes on the electromagnet 3 and the base 4 to be led out;
the lower part of the base 4 is provided with a mounting cavity; a double-needle assembly is arranged in the mounting cavity; the double-needle assembly comprises an inner sealing piece 9, two connecting needles 10 and a plastic piece 11 for wrapping the upper parts of the two connecting needles 10; the inner sealing element 9 is hermetically arranged in the mounting cavity of the base 4, and the inner sealing element 9 is provided with two sealing holes matched with the upper end of the connecting needle 10; the plastic part 11 is arranged below the inner sealing part 9 and is in close fit connection with the lower part of the base 4; the lower part of the connecting needle 10 extends out of the base 4; the ground wire pin 701 of the coil 7 penetrates into one connecting pin, and the main wire pin 702 is sleeved with the insulating sleeve 12 and penetrates into the other connecting pin 10; the ground wire pin 701 and the main wire pin 702 are each soldered to the end of the corresponding connection pin 10. The connection pin 10 can be electrically connected with an external kitchen range circuit board, and the kitchen range circuit board is connected with a thermocouple.
The shell 1 is formed by integrally drawing and stamping stainless steel soft magnetic materials, the upper part of the shell is of a horn-shaped necking structure, and the lower part of the shell is provided with an opening riveted with an electromagnet. The housing 1 is shielded on the one hand from external possible magnetic influences and on the other hand binds the magnetic field generated by the inner coil to form a magnetic circuit.
In the present utility model, the spring 8 has a tapered structure with a large inner diameter at an upper portion and a small inner diameter at a lower portion, and the upper portion is engaged with the gasket 5 and the lower portion is engaged with the reduced structure of the housing 1. The spring 7 with the conical structure can effectively prevent the deflection generated by the overall transverse movement of the spring on one hand, and the phenomenon of overlapping of the coils of the spring can not occur during full compression on the other hand, so that the effective use length is greatly increased.
A gasket 14 sleeved on the electromagnetic shaft 2 is also arranged between the sealing gasket 5 and the spring 8; the gasket 14 is made of copper material and is formed by stamping once; the gasket 14 has a lower recess 1401 and an upper flange 1402, and the upper flange 1402 supports the gasket 5, and the lower recess 1401 cooperates with the spring 8 to support and position the gasket 5. The gasket cooperates with the spacer so that spring force can be transferred to the gasket through the rigid spacer so that the overall force of the flexible gasket is more uniform.
The middle part of the upper side of the sealing gasket 5 is of a concave structure, and the sealing surface of the sealing gasket 5 is of a convex structure surrounding the concave structure. The middle part of the sealing gasket 5 is provided with a middle hole, and the sealing gasket 5 is connected with the shaft end of the electromagnetic shaft 2 through the middle hole. The sealing surface of the sealing gasket 5 is of a convex structure, after the sealing gasket is in sealing contact with the vent of the valve body of the gas valve, the pressure intensity of the convex ring is larger than that of the whole plane, the local compression amount of the sealing gasket is increased, and the gas tightness is firmer.
The framework 6 is a plastic mold forming part, and the upper part of a long straight hole at the center of the framework is matched with the electromagnetic shaft 2; the lower end is tightly matched and fixed with the electromagnet 3.
The electromagnetic shaft 2 is machined by adopting stainless steel soft magnetic materials, the upper part of the electromagnetic shaft is matched with the sealing gasket 5, and the lower part of the electromagnetic shaft penetrates through the shell 1 and is inserted into the framework 6; the electromagnetic shaft 2 can move up and down in the long straight hole of the framework 6 along with the attraction and detachment of the electromagnetic valve.
The lower end of the electromagnetic shaft 2 has a small diameter step 201. The electromagnetic valve can be attracted for tens of thousands times in the service life, the end face of the electromagnetic shaft 2 collides with the upper end face of the electromagnet 3 for tens of thousands times, and the edge of the shaft end face is inevitably deformed outwards; the design of the small direct step 201 can effectively avoid the influence on the up-and-down motion of the electromagnetic shaft caused by the fact that the edge deformed outwards scrapes the inner hole wall of the framework.
The V-shaped pit 202 is arranged on the end face of the small-diameter step 201 of the electromagnetic shaft 2, so that the problem of center protrusion caused by cutter abrasion in the machining process can be effectively avoided.
The electromagnet 3 is machined by adopting stainless steel soft magnetic materials, and columnar bulges at the upper part of the electromagnet are matched with long straight holes of the framework 6. V-shaped pits are also formed in the end face of the electromagnet 3, so that the problem of center protrusion caused by cutter abrasion in the machining process of the electromagnet can be effectively avoided. Two leading holes on the electromagnet 3 for the ground wire pins and the main wire pins of the coil to pass through are symmetrically arranged. The side of the electromagnet 3 is designed with a riveting groove 303 so as to be riveted with the shell 1 to form a connecting whole;
the base 4 is formed by machining common brass, and two guide holes for the ground wire pins and the main wire pins of the coil to pass through are symmetrically formed in the base 4. The outer side of the base 4 is provided with a sealing ring 13, and the sealing ring 13 is in sealing fit with a valve body of a gas valve (plug valve) of the kitchen range, so that the sealing effect of the electromagnetic valve and the gas valve body is improved. The lower side of the base 4 is further provided with a complete circle of clamping grooves 401 to be clamped with an external connecting piece.
The lower part of the base 4 is connected with a bracket 15, the cross section of the bracket 15 is of a shape like a Chinese character 'ji', and the bracket can be connected with a valve body of a kitchen range gas valve through a screw, so that the assembly of the electromagnetic valve and the valve body of the gas valve is realized, and the suitability, the universality and the replaceability of the electromagnetic valve are improved.
After the electromagnetic valve is applied to a stove flameout protection device, when the electromagnetic valve is started to attract, a stove circuit board energizes a coil 7, current enters from a main line pin 702 and flows out from a ground line pin 701, the coil 7 generates a magnetic field, an electromagnetic shaft 2 and an electromagnet 3 are magnetized to generate magnetic force, the electromagnetic shaft 2 and the electromagnet 3 are attracted, and a sealing gasket 5 of the electromagnetic valve opens a gas channel of a gas valve body. In the attraction and holding state, a thermocouple connected to the kitchen range circuit board is heated to generate electric potential, the thermoelectric potential is used as an electric signal to be transmitted to the circuit board, and the circuit board senses the electromotive force and continuously supplies power to the coil so as to maintain attraction. If the thermocouple on the kitchen range circuit board cannot sense flame, the coil 7 is powered off, the electromagnetic shaft 2 is separated from the electromagnet 3, and the sealing gasket 5 of the electromagnetic valve closes the gas channel of the gas valve body, so that the flameout protection effect is achieved.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (10)
1. A from inhaling formula double needle solenoid valve for on cooking utensils flameout protection device, its characterized in that: comprises a shell, an electromagnetic shaft, an electromagnet, a base and a sealing gasket; a framework with a hollow structure is arranged in the shell, and a coil is wound on the framework; the lower part of the electromagnetic shaft extends into the framework; the upper end of the electromagnetic shaft is connected with the sealing gasket, and a spring sleeved on the electromagnetic shaft is arranged between the sealing gasket and the upper end of the shell; the electromagnetic shaft can move up and down; the electromagnet is provided with a columnar protruding part and a lower connecting part, the columnar protruding part of the electromagnet stretches into the framework, the edge part of the lower connecting part of the electromagnet is riveted with the lower end of the shell, and the middle part of the lower connecting part is riveted in the middle hole of the base; two guide holes are formed in the base and the electromagnet; the ground wire pin and the main wire pin of the coil are respectively led out from the corresponding leading holes;
the lower part of the base is provided with a mounting cavity; a double-needle assembly is arranged in the mounting cavity; the double-needle assembly comprises an inner sealing piece, two connecting needles and a plastic piece for wrapping the two connecting needles; the inner sealing piece is hermetically arranged in the mounting cavity of the base, and is provided with two sealing holes matched with the upper ends of the connecting pins; the plastic part is arranged below the inner sealing part; the lower part of the connecting needle extends out of the base; the ground wire pin and the main wire pin of the coil respectively penetrate into the corresponding connecting needle and are welded with the end part of the connecting needle.
2. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: the base is arranged on a bracket which is used for being connected with a gas valve body of the kitchen range; the base is in sealing fit with a gas valve body of the kitchen range.
3. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: the spring is of a conical structure.
4. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: a gasket sleeved on the electromagnetic shaft is further arranged between the sealing gasket and the spring, the gasket is provided with a lower concave part and an upper flange, and the upper flange supports the sealing gasket; the concave part is matched with the spring.
5. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: the middle part of the upper side of the sealing gasket is of a concave structure, and the sealing surface of the sealing gasket is of a convex structure surrounding the concave structure.
6. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: the lower end of the electromagnetic shaft is provided with a small-diameter step.
7. The self-priming double needle solenoid valve for a fire extinguishing device of a kitchen range as claimed in claim 6, wherein: the end face of the small-diameter step of the electromagnetic shaft is provided with a pit.
8. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: the framework is of an I-shaped structure.
9. A self-priming double needle solenoid valve for a cooktop flameout protection device as claimed in claim 3, wherein: the upper part of the shell is a horn-shaped necking structure so as to be matched with the spring.
10. The self-priming double-needle electromagnetic valve for a flameout protection device of a kitchen range according to claim 1, wherein the self-priming double-needle electromagnetic valve is characterized in that: and a sealing ring matched with a gas valve body of the kitchen range is arranged on the outer side of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321670336.XU CN219994524U (en) | 2023-06-28 | 2023-06-28 | Self-priming double-needle electromagnetic valve for flameout protection device of kitchen range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321670336.XU CN219994524U (en) | 2023-06-28 | 2023-06-28 | Self-priming double-needle electromagnetic valve for flameout protection device of kitchen range |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219994524U true CN219994524U (en) | 2023-11-10 |
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ID=88608662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321670336.XU Active CN219994524U (en) | 2023-06-28 | 2023-06-28 | Self-priming double-needle electromagnetic valve for flameout protection device of kitchen range |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219994524U (en) |
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2023
- 2023-06-28 CN CN202321670336.XU patent/CN219994524U/en active Active
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